Speleocuma guanche, Corbera, 2002

Corbera, Jordi, 2002, Amphi-Atlantic distribution of the Mancocumatinae (Cumacea: Bodotriidae), with description of a new genus dwelling in marine lava caves of Tenerife (Canary Islands), Zoological Journal of the Linnean Society 134 (4), pp. 453-461 : 455-457

publication ID	https://doi.org/ 10.1046/j.1096-3642.2002.00016.x
DOI	https://doi.org/10.5281/zenodo.5700707
persistent identifier	https://treatment.plazi.org/id/820B8780-CB2C-016B-FE8E-FD42FB6733F3
treatment provided by	Carolina
scientific name	Speleocuma guanche
status	sp. nov.

Treatment

Speleocuma guanche View in CoL sp. nov.

Type material. Cueva Escalón, Agua Dulce cave complex, Tenerife , Canary Islands, sta. AD 1, 7 m. Holotype: ovigerous female dissected on two slides [ ICM, CUM-0027 ]. Paratypes: 11 adult females, two preadult females, three immature females, two adult males, one immature male and one manca [ ICM, CUM-0028 ]. Collected by T. Cruz on August 1, 1997.

Other material. Cueva Sin Fin, sta. AD 3, three ovigerous females, four preadult females, one adult male, three preadult males, one juvenile. Cueva Escachada, sta. AD 5, three ovigerous females, three preadult females, one adult male, one immature male, one juvenile, one manca.

Etymology. Guanche was the name of the early human settlers of the Canary Archipelago.

Description. Adult female, 2.9 mm total length ( Fig. 1a View Figure 1 ). Integument covered by scales that have their margin finely denticulate ( Figs 2a.b View Figure 2 ). Carapace slightly longer than high, about one-fourth total body length; middorsal with a double row of small denticles on anterior third, behind eyelobe. Pseudorostral lobes short, extending beyond and meeting anterior to eyelobe. Antennal notch wide, with anterolateral angle and anterolateral margin denticulate. Exopods on pereopod 1–3 and on maxilliped 3.

Peduncle of first antenna 3-segmented ( Fig. 3a View Figure 3 ), 3rd segment a little longer than 2nd, main fagellum 2- segmented with two aesthetascs and long seta distally. Mandibles pars incisiva with four teeth; 13 long setae between pars incisa and truncate pars molaris ( Figs 4a.b View Figure 4 ). Maxilla 1 ( Fig. 4c View Figure 4 ) with simple robust acuminate setae on protopod, palp with two unequal filaments. Maxilla 2 ( Fig. 4d View Figure 4 ) with simple setae on the two endites and inner margin of protopod. Maxilliped 1 ( Fig. 4e View Figure 4 ) with distal process of basis reaching the carpus, with acuminate setae and a strong serrate seta; flattened hand-like setae on inner margin of carpus; propodus twice length of dactylus. Basis of maxilliped 2 ( Fig. 3b View Figure 3 ) longer than the rest of limb, outer distal margin with one stout plumose seta and a simple seta, inner distal margin with one stout plumose seta; ischium short; carpus and propodus of similar length, both with setae on inner margin; dactylus half length of propodus with two distal claws. Basis of maxilliped 3 ( Fig. 3c View Figure 3 ) slightly longer than combined length of other articles; outer distal process not developed, with three long plumose setae; inner margin with seven plumose setae; ischium very short and unarmed; merus and carpus with one and three inner plumose setae, respectively; propodus as long as carpus and twice as long as dactylus. Pereopod 1 only the basis remaining. Basis of pereopod 2 ( Fig. 3d View Figure 3 ) slightly shorter than the combined lengths of other articles, with two spine-like setae on inner distal margin; ischium very short; merus twice as long as ischium; carpus longer than merus with some setae on distal margin; propodus about half length of carpus; dactylus as long as combined length of carpus and propodus, with a distal spine-like seta longer than article, three small setae on distal margin and some other on the inner margin. Basis of pereopod 3 ( Fig. 3e View Figure 3 ) about 1.3 times longer than rest of limb; ischium short with two setae; merus slightly longer than ischium; carpus as long as ischium and merus combined, with two distal long setae; propodus half long as carpus with two distal setae; dactylus very short with simple seta distally. Pereopod 4 ( Fig. 3f View Figure 3 ) similar to 3 except for some differences in setation and lack of exopod. Peduncle of uropod ( Fig. 3g View Figure 3 ) longer than last abdominal somite, with six acuminate setae on inner margin. Endopod as long as peduncle, 2-segmented; proximal segment twice as long as distal, with five acuminate setae on inner margin; distal segment with three acuminate setae on inner margin and a long distal spine-like seta. Exopod shorter than endopod, 2- segmented, second segment with two long distal spinelike setae, three setae on outer margin and other one on inner margin.

Adult male ( Figs 1b View Figure 1 and 5 View Figure 5 ), 2.4 mm total length, considerably smaller than female. Differing from the female as follows: integument with small scattered hairs. Middorsal line of carapace smooth. Pseudorostral lobes very short, not reaching beyond eyelobe. Peduncle of the second antenna ( Fig. 5a View Figure 5 ) 5-segmented, with sensorial setae on fourth and fifth segments; flagellum short, scarcely reaching fourth free thoracic somite. Abdomen with two pairs of pleopods. Peduncle of uropod ( Fig. 5k View Figure 5 ) with 11 acuminate setae on inner edge, endopod with nine acuminate setae on first segment and four on second.

Remarks. A previous record of a cumacean species from the Jameos del Agua, Lanzarote, assigned to the family Leuconidae (see García-Valdecasas, 1985), is not supported here because of the presence of a developed eye. Apparently, it could belong to the subfamily Mancocumatidae and perhaps to the new genus described above, since it displays two pairs of pleopods (see García-Valdecasas, 1985: fig. 8). However, a more concise identification is not possible due to the lack of a detailed description.