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In the present study, halacarid mites inhabiting various macroalgae, barnacles and sand sediments from Tenerife (Canary Islands) were examined and identified for the first time. Among 114 individuals, 11 halacarid species belonging to six genera were detected: Agaue adriatica, Agauopsis brevipalpus, Agauopsis microrhyncha, Agauopsis tricuspis, Copidognathus lamelloides, C. magnipalpus, C. remipes, Halacarus subtilis, H. actenos, Halacaropsis hirsuta and Rhombognathus procerus. Presence of the epibiont suctorian ciliate species “Praethecacineta halacari” on C. magnipalpus is reported for the first time from the Canary Islands., The first author (FD) would like to thank Isparta University of Applied Sciences, Fisheries Faculty, Biology, Ecology and Limnology laboratory (Isparta, Türkiye), Ondokuz Mayis University, Faculty of Agriculture, Department of Plant Protection, (Samsun, Türkiye) and Mediterranean Fisheries Research, Production and Education Institute (Antalya, Türkiye) for providing laboratory facilities. The Cabildo de Tenerife (Island Council) granted the collecting permit. The third author (DHT) is currently funded by the Cabildo de Tenerife, under the TFinnova Programme supported by MEDI and FDCAN funds. The manuscript was edited by Guido Jones, also funded by the Cabildo de Tenerife under the same programme.

Halacaropsis hirsuta (Trouessart, 1889) Material examined 35 females, 7 males (FDHAL-21/8), 8 deutonymphs (FDHAL-21/9), 4 protonymphs (FDHAL-21/10), El Pris (Jania sp. and Amphiora sp., 2 m); 14 females, 5 males, one larva (FDHAL-21/11), La Barranquera (Corallina ferreyrae, Palisada perforata, mediolittoral zone). Diagnosis The length of females was 650–740 µm, for males 620–660 µm, for deutonymphs 560–580 µm, for protonymphs 410–470 µm and for the larva 300–310 µm long. Dorsal and ventral plates large. AD and OC with pair of gland pores. AD has a frontal spine anteriorly. Idiosoma have 5 pairs of idiosomatic setae on adult females and males. This species has the ds-1 on AD. Enlarged setae from ds-2, ds-3 and ds-4 situated in striated integument. It has ds-5 on PD. Adanal setae on anal plate. PE with one dorsal and three ventral setae. Leg I thickened and armoured with heavy spiniform setae and wider than the following legs in all stages (Figs. 4A, C–E). GA with 21 pairs of pgs and 5 pairs of sgs. Spermatopositor large, extending to anterior margin of GA (Fig. 10D). Remarks This species is very common in the Mediterranean Sea (Croatia, Egypt, France, Italy, Spain, Strait of Gibraltar and Türkiye) (Durucan 2020, 2021) and North Atlantic waters (Bartsch 2009). Specimens were found among macroalgae and sand habitats. At the two Tenerife localities, we found more than 70 individuals including all life-stages. The morphological characteristics, habitat preferences and body sizes of the specimens reported here fit with previous records by Viets (1940) and Durucan (2019a)., Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on pages 10-11, DOI: 10.22073/pja.v12i1.76823, {"references":["Viets, K. (1940) Meeresmilben aus der Adria (Halacaridae und Hydrachnellae, Acari). Archiv fur Naturgeschichte (Neue Folge), 9: 1 - 135.","Durucan, F. (2020) Mediterranean and Black Sea marine halacarids (Halacaridae: Acari): A review. Journal of Black Sea / Mediterranean Environment, 26 (3): 352 - 373.","Durucan, F. (2021) Halacaridae (Acari: Prostigmata) of the Aegean Sea of Turkey (Canakkale and Izmir). Persian Journal of Acarology, 10 (3): 341 - 346. DOI: 10.22073 / pja. v 10 i 3.676 99","Bartsch, I. (2009) Checklist of marine and freshwater halacarid mite genera and species (Halacaridae: Acari) with notes on synonyms, habitats, distribution, and descriptions of the taxa. Zootaxa, 1998: 1 - 170.","Durucan, F. (2019 a) New halacarid records from Antalya, Turkey (Acari, Halacaridae). Munis Entomology and Zoology, 14 (1): 270 - 282."]}

Copidognathus lamelloides Bartsch, 2000 Material examined One male (FDHAL-21/5), El Pris (Corallina ferreyrae, 1–2 m). Diagnosis Idiosoma of only one male was 262 µm long and 187 µm wide. AD with 3 round raised areolae with rosette pores. OC almost as long as AD. Glp-1 is in margins of porose areolae. Telofemora I and II with small ventral lamellae. Tibia IV has bipectinate setae (Fig. 3E). According to Bartsch (2001), C. lamelloides resembles to C. brevipes. Distinguishing characters are: position of glp-1 (in margins of porose areolae vs near lateral margin of AD), ds-2 (within striated integument vs on OC), length:height ratio of telofemur I (1.7–2.1 vs 1.5–1.6) and shape of ventromedial seta on tibia IV (bipectinate vs smooth). Remarks This species was originally described by Bartsch (2000) from Atlantic France (Baie de Morlaix). It is present in the north eastern Atlantic, Mediterranean Sea and Black Sea (Bartsch 2009). The morphological characteristics of the specimen from Tenerife agree with the previous reports of the species from Crimea (Black Sea) (Bartsch 2001) and Türkiye (Levantine Sea) (Durucan 2019b)., Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on pages 5-6, DOI: 10.22073/pja.v12i1.76823, {"references":["Bartsch, I. (2000) Copidognathus lamelloides sp. n. (Copidognathinae, Halacaridae, Acari), a new species from European waters. Entomologische Mitteilungen aus dem Zoologischen Museum Hamburg, 13: 219 - 228.","Bartsch, I. (2001) Black Sea Copidognathinae (Arachnida, Acari, Halacaridae): A review. Mitteilungen aus dem Museum fur Naturkunde in Berlin, Zoologische Reihe, 77: 247 - 275.","Bartsch, I. (2009) Checklist of marine and freshwater halacarid mite genera and species (Halacaridae: Acari) with notes on synonyms, habitats, distribution, and descriptions of the taxa. Zootaxa, 1998: 1 - 170.","Durucan, F. (2019 b) New records of Copidognathus (Acari: Halacaridae) from Antalya, Turkey. Persian Journal of Acarology, 8 (3): 189 - 210. DOI: 10.22073 / pja. v 8 i 3.49588"]}

Copidognathus remipes (Trouessart, 1894) Material examined One male (FDHAL-21/7), El Pris (Amphiora sp., 2 m). Diagnosis The male specimen was 310 µm in length and 160 µm width (Fig. 3G). Copidognathus remipes is very similar to C. gibbus. The most marked differences between these two species are as follows: C. remipes is smaller than C. gibbus; the idiosoma color of C. remipes darker than C. gibbus; and C. remipes has a pair of short, weak and narrow costae on the PD (Durucan 2019b). Anterior dorsal plate “A” shaped costae, OC longer than wide (80 µm/20 µm), telofemura I wide ventrolateral lamella., Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on page 6, DOI: 10.22073/pja.v12i1.76823, {"references":["Durucan, F. (2019 b) New records of Copidognathus (Acari: Halacaridae) from Antalya, Turkey. Persian Journal of Acarology, 8 (3): 189 - 210. DOI: 10.22073 / pja. v 8 i 3.49588"]}

Halacarus subtilis Viets, 1940 Material examined One female (FDHAL-21/13), La Barranquera (Gelidium pusillum, upper mid-littoral zone). Diagnosis The idiosoma length of the only female specimen was 395 µm long and it was 230 µm wide. Epicuticula on plates, gnathosoma and legs with striae in parallel and fingerprint-like arrangement. Pair of first dorsal setae (ds-1) posterior to first gland pore. OC with cornea, pair of gland pores 2 on OC and gland pore 4 striated integument, gland pore 5 on posterior dorsal plate. PD with reticulate ornamentation. Tarsi III and IV each with four ventral setae. All paired claws with accessory processes (Figs. 3I, 6C–E, 10A–D). Figure 10. A–C. Halacarus subtilis Viets, 1940 (female) – A. Dorsal view of idiosoma; B. Ventral view of idiosoma; C. Medial view of leg I, D. Halacaropsis hirsuta (Trouessart, 1889), detailed male genitoanal plate; (Scale bars: A–C: 50 µm, D: 100 µm). Remarks Halacarus subtilis was originally described by Viets (1940) from the Mediterranean Sea (Croatia, Rovinj and Split). This is the first report in the Atlantic Ocean. The morphological characteristics of the specimen from Tenerife matches description by Viets (1940) and Bartsch (2007)., Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on pages 13-15, DOI: 10.22073/pja.v12i1.76823, {"references":["Viets, K. (1940) Meeresmilben aus der Adria (Halacaridae und Hydrachnellae, Acari). Archiv fur Naturgeschichte (Neue Folge), 9: 1 - 135.","Bartsch, I. (1975) Ein Beitrag zur Rhombognathinen-Fauna (Halacaridae, Acari) der Bretagne-Kuste. Acarologia, 17: 53 - 80.","Bartsch, I. (2007) Halacarus longiunguis Police, 1909 (Acari: Halacaridae), a new record a century later, re-description and notes on Mediterranean Halacarus species. Entomologische Mitteilungen aus dem Zoologischen Museum Hamburg, 14 (176): 393 - 403."]}

Agauopsis tricuspis Benard, 1962 Material examined One female and one male (FDHAL-21/4), El Pris (Gelidium pusillum, mediolittoral zone); one male, La Barranquera. Diagnosis Length of the female was 440 µm, and 380 µm for male. Agauopsis tricuspis is characterized by having five spines on telofemur I and being spread along the eastern North Atlantic and Mediterranean Sea (Bartsch 2015) (Figs. 3D, 5C, D, 8A–E). The morphological characteristics of the specimens from Tenerife agree well with the previous reports of the species from France (Roscoff) (Benard 1962) and (Bay of Arcachon) (Bartsch 1976), and Italy (Krantz 1970). Remarks It was originally described by Benard (1962) from France Atlantic (Roscoff, Bloscon) among barnacles (Chthamalus stellatus). Later, the species was reported from the Mediterranean Sea (Adriatic Sea, Venice) amongst mussel beds, by Krantz (1970), and Atlantic France (Bay of Arcachon), again by Bartsch (1976). After that, it was reported from Ireland, United Kingdom, France and Spain, according to Bartsch (1976, 2015)., Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on page 5, DOI: 10.22073/pja.v12i1.76823, {"references":["Benard, F. (1962) Sur une nouvelle espece d'Acariens marin, Agauopsis tricuspis (superfamille des Prostigmata, famille des Halacaridae). Acarologia, 4: 215 - 229.","Bartsch, I. (2015) The Agauopsis brevipalpus group (Acari: Halacaridae), descriptions of tropical Indo-West Pacific species, a key to all species, their geographical distribution and reflections on dispersal routes. Acarologia, 55 (2): 147 - 169.","Bartsch, I. (1976) Erganzung zur Halacariden-Fauna (Halacaridae, Acari) im Becken von Arcachon. Vie et Milieu, Serie A, 26: 31 - 46.","Krantz, G. W. (1970) Agauopsis vidae, a new species of Halacaridae (Acari: Prostigmata) from the Northern Adriatic Sea, with notes on its behavior. Archivio di Oceanografia e Limnologia, 16: 247 - 262."]}

Halacarus actenos Trouessart, 1889 Material examined One male (FDHAL-21/12), La Barranquera (Hypnea spinella, upper mid-littoral zone). Diagnosis The male specimen measured 592 µm long to the tip of the frontal spine and 350 µm wide. General characters of this species are as follows. Frontal spine medium-sized; posterior part of AD slender; ds-1 on AD; ds-2 to ds-6 striated integument. Eye pigment arranged in a ring around cornea; pair of canaliculi in striated integument posterior to cornea; dorsum with pair of large corneae; PD completely absent. Apodemes between epimera I and II long. Epicuticula on plates and legs exquisitely reticulate. Male GA wide and rounded, covered by more than 60 setae (Figs. 3H, 5E–G, 9A–E). Remarks Halacarus actenos was reported from United Kingdom, Ireland, The Netherlands, French Atlantic coasts (Bay of Morlaix, Le Croisic, Baie de Port-lin, Arcachon, Saint Jean-de-Luz) and Spain (Galicia, Praia de Vidrieiro) (Bartsch 2009). This species was also reported by the first author (FD) from Praia da Falésia (Albufeira, Portugal) (Durucan et al. 2018). The morphological characteristics, habitat preferences and body sizes of the specimens reported here fit the previous records by Bartsch (2011) and Durucan et al. (2018)., Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on pages 11-12, DOI: 10.22073/pja.v12i1.76823, {"references":["Bartsch, I. (2009) Checklist of marine and freshwater halacarid mite genera and species (Halacaridae: Acari) with notes on synonyms, habitats, distribution, and descriptions of the taxa. Zootaxa, 1998: 1 - 170.","Bartsch, I. (2011) Halacarus socius (Acari: Halacaridae), description of the male and diagnoses of species of the Halacarus actenos group. Zootaxa, 2800: 18 - 40."]}

Agauopsis brevipalpus (Trouessart, 1889) Material examined One female (FDHAL-21/2) and three males, El Pris (Gelidium sp., upper mid-littoral zone); one female and one male, La Barranquera (Gelidium pusillum, upper mid-littoral zone). Diagnosis The length of females was between 400 and 460 µm, and for males, 450 µm. Idiosoma wide and heavily armed. Integument of plates brownish. Raised porose areolae of dorsal plates with canaliculi. Ostia lacking. AD with small frontal process and the plate clearly raised H-like costa. OC with two corneae, porose areola triangular in outline and rounded angles. Eye spots present beneath AD and OC. PD with pair of medial and lateral costae and the plate anteriorly rounded. Ventral plates porose and faintly reticulate. AE wide, posterior margin of AE and anterior margin of GA truncate. Gnathosoma and palps are slender. Rostrum about as long as gnathosomal base (Bartsch 1996) (Fig. 3B). Remarks This is one of the species most encountered within a genus widely distributed and reported in the Black Sea, Mediterranean Sea and eastern Atlantic (Bartsch 2004; Durucan and Boyaci 2018; Durucan 2020, 2021). In the Atlantic Ocean, A. brevipalpus has been reported from the Azores, Canary Islands, British Isles and continental Spain (Bartsch 2015)., Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on page 4, DOI: 10.22073/pja.v12i1.76823, {"references":["Bartsch, I. (1996) Agauopsis (Acari, Halacaridae) of the Sevastopol area; supplementary notes on taxonomy and ecology. Revue suisse de Zoologie, 103 (3): 697 - 712.","Bartsch, I. (2004) The Black Sea halacarid fauna (Halacaridae, Acari): faunal comparison with the Mediterranean, eastern North Atlantic, North Sea, and Baltic and reflection on its origin. Mitteilungen aus dem Museum fur Naturkunde in Berlin, Zoologische Reihe, 80: 143 - 158.","Durucan, F. & Boyaci, Y. O. (2018) Halacarid mites of the genus Agauopsis (Acari: Halacaridae) from Antalya (Turkey). Ege Journal of Fisheries and Aquatic Sciences, 35 (1): 49 - 53. DOI: 10.12714 / egejfas. 2018.35.1.09","Durucan, F. (2020) Mediterranean and Black Sea marine halacarids (Halacaridae: Acari): A review. Journal of Black Sea / Mediterranean Environment, 26 (3): 352 - 373.","Durucan, F. (2021) Halacaridae (Acari: Prostigmata) of the Aegean Sea of Turkey (Canakkale and Izmir). Persian Journal of Acarology, 10 (3): 341 - 346. DOI: 10.22073 / pja. v 10 i 3.676 99","Bartsch, I. (2015) The Agauopsis brevipalpus group (Acari: Halacaridae), descriptions of tropical Indo-West Pacific species, a key to all species, their geographical distribution and reflections on dispersal routes. Acarologia, 55 (2): 147 - 169."]}

Agauopsis microrhyncha (Trouessart, 1889) Material examined Five males (FDHAL-21/3), one deutonymph, El Pris (Gelidium sp., upper-mid littoral zone); three females, six males, La Barranquera (Corallina ferreyrae, mediolittoral zone). Diagnosis Idiosoma length in females was 420–430 µm, in males, 360–430 µm and in deutonymph 350 µm. Idiosoma wide, flattened and heavily armed. AD and PD slightly raised longitudinal costae. AD areola M-shaped and the plate slightly longer than wide. OC with two corneae. The species can easily be recognized by having a ventral and two anterior spines on telofemur I, a ventral and three anterior spines on tibia I, two of which are adjacent (Fig. 3C) (Pepato and Tiago 2003; Mytilineou et. al. 2016; Durucan 2021). Remarks This species is present, at least, in the Mediterranean Sea and eastern Atlantic Ocean (Viets 1940; Bartsch 2009). The morphological characteristics of the specimens reported here accord with records previously given by Mytilineou et al. (2016) and Durucan (2021)., Published as part of Durucan, Furkan, Paz, Juan Carlos De La & Hernández-Teixidor, David, 2023, Halacaridae (Acari) from Tenerife (Canary Islands), pp. 1-19 in Persian Journal of Acarology 12 (1) on pages 4-5, DOI: 10.22073/pja.v12i1.76823, {"references":["Pepato, A. R. & Tiago, C. G. (2003). A new species of Agauopsis (Halacaridae, Acari) from Brazil. Cahiers de Biologie Marine, 44: 369 - 373.","Durucan, F. (2021) Halacaridae (Acari: Prostigmata) of the Aegean Sea of Turkey (Canakkale and Izmir). Persian Journal of Acarology, 10 (3): 341 - 346. DOI: 10.22073 / pja. v 10 i 3.676 99","Viets, K. (1940) Meeresmilben aus der Adria (Halacaridae und Hydrachnellae, Acari). Archiv fur Naturgeschichte (Neue Folge), 9: 1 - 135.","Bartsch, I. (2009) Checklist of marine and freshwater halacarid mite genera and species (Halacaridae: Acari) with notes on synonyms, habitats, distribution, and descriptions of the taxa. Zootaxa, 1998: 1 - 170.","Mytilineou, Ch., Akel, N., Babali, N., Balistreri, P., Bariche, M., Boyaci, Y. O., Cilenti, C., Constantinou, C., Crocetta, F., Celik, M., Dereli, H., Dounas, F., Durucan, F., Garrido, A., Gerovaslileiou, V., Kapiris, K., Kebapcioglu, T., Kleitou, A., Krystalas, L., Lipej, L., Maina, P., Marakis, B., Mavric, B., Moussa, R., PenaRivas, L., Poursanidis, D., Renda, W., Rizkalla, S. I., Rosso, A., Scirocco, T., Sciuto, F., Servello, G., Tiralongo, F., Yapici, S. & Zenetos, A. (2016) New Mediterranean biodiversity records. Mediterranean Marine Science, 17 (3): 794 - 821. DOI: 10.12681 / mms. 1976"]}

A new record of the cirrate octopod Opisthoteuthis massyae (Grimpe, 1920) is described from the vicinity of Tenerife Island (Canary Island, Spain). The specimen was a male having arms of pair I markedly thicker and enlarged suckers on the proximal fields of all arms and the distal field of arms II, III and IV. This record was confirmed applying phylogenetic analysis based on the cytochrome oxidase 1 mitochondrial gene sequence (Cox-1). This is the first cirrate octopod reported from the Canary Islands and the third Cox-1 sequence obtained for this species., We thank Sergio D. Hernández Herrera and the Diomedea crew for collecting the specimen and provide it for its study. We are also grateful for the support to Alejandro Escánez through the “Margarita Salas” postdoctoral research contract funded by the Next Generation EU (NGEU) fund of the European Union and the “Plan de Recuperación Transformación y Resilencia” of the Government of Spain. David Hernández-Teixidor is currently funded by the Cabildo de Tenerife, under the TFinnova Programme supported by MEDI and FDCAN funds.

Aportamos 25 primeras citas de distribución insular de insectos (19 correspondientes a dípteros y 6 a himenópteros) de las islas de Lanzarote, Fuerteventura, La Gomera, La Palma y El Hierro (Islas Canarias, España). Destacan primeros registros de especies endémicas hasta este momento monoinsulares como Nemotelus insularis y registros de especies exóticas como Copestylum melleum. Estos resultados ponen de manifiesto la importancia de la realización de estudios faunísticos y corológicos en las islas, ya que aportan información vital para mejorar el conocimiento de la fauna, tanto exótica como nativa, lo que ayuda a desarrollar medidas de gestión y conservación más eficaces., Agradecemos a los Cabildos de El Hierro, La Palma, La Gomera, Fuerteventura y Lanzarote la concesión de permisos para la colecta de ejemplares. A Rocío Castro-Urgal, Rafael García, Irene Santos, Francisco de León y Yeray Martín la cesión de datos para la elaboración de este artículo. También queremos agradecer a Marcos Báez la identificación de especies del orden Diptera, y a Pedro Oromí por su ayuda durante la elaboración del manuscrito, de igual forma queremos agradecer a Miguel Carles-Tolra y a un revisor anónimo por sus inestimables comentarios que han mejorado este trabajo.

A new species of intertidal oribatid mites from Tenerife is described and its full ontogenetic development is given in detail. Thalassozetes canariensis sp. nov. can easily be distinguished from its congeners by its characteristic notogastral cuticular pattern showing loosely distributed irregular elevations, and its rectangular median sternal cavity. Based on morphology, Thalassozetes canariensis sp. nov. is most closely related to the Mediterranean T. riparius; both species share a small transversal band-like notogastral light spot and the longitudinal orientation of lyrifissure iad. The juvenile morphology of T. canariensis sp. nov. conforms basically to those of known Thalassozetes juveniles but there are discrepancies in certain aspects that require further research into all known species. This report of T. canariensis sp. nov. from Tenerife is the first record of an intertidal mite for the Canaries, and also for the Eastern Atlantic area. Further records of this species within the area may be expected., The Cabildo de Tenerife (Island Council) granted the collecting permit. We thank Pedro Oromí (La Laguna University) for making available his laboratory and collections. DHT is funded by the Cabildo de Tenerife, under the TFinnova Programme supported by MEDI and FDCAN funds. The manuscript was edited by Guido Jones, also funded by the Cabildo de Tenerife under the same programme.

[EN] In this study, the presence, distribution, and chorology of more than 3,000 individuals belonging 38 families and 173species of Heteroptera from the Canary Islands has been revised. Specimens of the suborder Heteroptera were collected from the different islands and an updated checklist of the species occurring in the archipelago is presented. Three new records for the Canaries and 36new records for at least one island are presented herein., [ES] En este estudio se revisa la presencia, distribución ycorología de más de 3.000 ejemplares pertenecientes a 38 familias y 173especies de las islas Canarias.Dichos ejemplares fueron capturados en las diferentes islas por lo que se presenta una lista actualizada de las especies presentes en el archipiélago. Se aportan tres nuevas citas para las Canarias y 36nuevascitas para al menos una de las islas.

1. The large flightless grasshopper Acrostira bellamyi Uvarov, endemic to the island of La Gomera (Canary Islands), inhabits two different environments: the xeric euphorb shrubland, as is typical for congeneric Canarian species, and the humid laurel forest, a novel habitat for the genus. 2. We investigate genetic, morphological, and ecological variation among individuals of A. bellamyi from the two habitats. DNA sequence data were used to evaluate whether grasshoppers from the two environments represent distinct lineages. Morphological and trophic analyses were performed to assess phenotypic differentiation between the two different habitats. 3. Population genetic analyses support the hypothesis that the euphorb shrubland is the ancestral habitat for this species. Female laurel forest specimens are larger than those inhabiting the euphorb shrubland, and some external body parts exhibit significant morphometric differences between the two populations. Diet of shrubland individuals is completely different from that of laurel forest individuals. Although in each habitat they consume the most abundant plants, individuals are able to select food plants, which appear to be explained by their nutrient content. 4. Our results suggest that A. bellamyi has colonised laurel forest from shrubland, and that this habitat shift has resulted in genetic, morphological, and ecological changes, perhaps as an adaptation to this new habitat., This study was financed by a Spanish MMA project (025/2007 Organismo Autónomo de Parques Nacionales). David Hernández‐Teixidor has been financed by a PhD grant awarded by the Canarian Government, 85% financed with European Social fund, and then by Spanish FPU fellowship. Heriberto López had a post‐doctoral contract (JAE‐DOC) awarded by the Spanish National Research Council (CSIC).