Typhlamphiascus Lang, 1944

Gómez, Samuel, Corgosinho, Paulo Henrique Costa & Rivera-Sánchez, Karen I., 2021, Proposal of new genera and species of the subfamily Diosaccinae (Copepoda: Harpacticoida: Miraciidae), European Journal of Taxonomy 759 (1), pp. 1-62 : 8-12

Typhlamphiascus Lang, 1944

Type species

Amphiascus typhlops Sars, 1906 , by original designation.

Other species and subspecies

T. blanchardi (T. Scott & A. Scott, 1895) (originally described in Stenhelia )

T. bouligandi Soyer, 1971

T. brevicornis (I.C. Thompson & A. Scott, 1903) (originally described in Stenhelia )

T. capensis Kunz, 1975 comb. nov.

T. confusus (T. Scott, 1902) (originally described in Stenhelia )

T. confusus erythraeicus Por, 1963

T. confusus gullmaricus Por, 1963

T. dentipes (I.C. Thompson & A. Scott, 1903) (originally described in Stenhelia )

T. gracilicaudatus (I.C. Thompson & A. Scott, 1903) (originally described in Stenhelia )

T. gracilis Por, 1963

T. higginsi Chullasorn, 2009

T. lamellifer ( Sars, 1911) (originally described in Amphiascus )

T. latifurca Por, 1968

T. medici sp. nov.

T. ovale Wells & Rao, 1987

T. pectinifer Lang, 1965

T. tuerkayi Ma & Li, 2017

T. unisetosus Lang, 1965

Species incertae sedis

Stenhelia hirsuta Thompson, 1893

T. accraensis (T. Scott, 1894) (described in Stenhelia )

T. drachi Soyer, 1963

T. longifurcatus Rouch, 1962

T. lutincola Soyer, 1963

T. typhloides ( Sars, 1911) (described in Amphiascus )

Species inquirendae

T. typhlops (Sars, 1906) sensu Por (1963)

T. aff. confusus confusus (T. Scott, 1902) sensu Moore (1976)

T. confusus confusus (T. Scott, 1902) sensu Marinov & Apostolov (1985)

Typhlamphiascus sp. in Vilela 1965

Typhlamphiascus sp. ? in Bodin 1964

Typhlamphiascus sp. ? in Bodin 1964

Typhlamphiascus sp. I (? confusus ) in Marinov 1977

Typhlamphiascus sp. II in Marinov 1977

Emended diagnosis

Miraciidae : Diosaccinae . Body fusiform; length: width ratio of caudal rami from about 1.0 to about 3.0. Rostrum not fused to cephalothorax, triangular, elongate, as long as first and second antennulary segments combined, with pointed tip, with one subdistal sensilla on each side. Female genital and third urosomites distinct dorsally and/or laterally, completely fused ventrally forming genital double-somite; genital and third urosomites separated in males. Length:width ratio of caudal rami variable, from 1:1 to 3:1. Female antennule seven- to nine-segmented, with aesthetasc and seta fused basally on fourth segment, and with apical acrothek on last segment. Male antennule haplocer, eight–ten-segmented, with aesthetasc and seta fused basally on fifth segment, and with apical acrothek on last segment. Antennulary setae typically smooth, except for few slightly setulose setae on penultimate and last articles in females and males. Antenna with allobasis; exopod three-segmented, armature formula 1-0-1,3,0. Mandibular palp biramous; endopod one-segmented, larger than exopod; exopod two-segmented. Maxillule biramous; rami one-segmented. Maxilla with three endites; endopod two-segmented. Maxilliped subchelate; (syn)coxa with two to four, basis with two setae; endopod one-segmented, with claw and variable number of accompanying setae. P1–P4 with three-segmented rami. Male P1 basis sexually dimorphic, with normal or modified (elongate, blunt) inner spine, without or with variable number of inner accessory spines (two–eight). Male P2 sexually dimorphic, two-segmented; first segment with one inner seta, second segment with two inner setae, two subdistal elements (one of which thick and blunt) and two elements (one medial, one apical) issuing from elongate cylindrical extension fused to segment basally. P5 EXP typically longer than wide, with four to six setae in the female and male; P5 endopodal lobe with four to five setae in the female, with two setae in the male; two innermost elements of the female P5 endopodal lobe and armature of the male P5 endopodal lobe bifurcate distally.

Armature formula of P1–P5 as follows:

1 The report of eight setae on the female P5 EXP of T. blanchardi is most probably erroneous. 2 Typhlamphiascus typhlops is known to lack inner armature on the P4 ENP2. The inner seta of P4 ENP2 of T. capensis comb. nov. might have become detached from the supporting segment as indicated by the interrupted cuticle ( Kunz 1975).

Sexual dimorphism expressed in the male antennule (see above), P1 basis, P2 ENP (see above), P5 (see above), structure of P6, and in the separated genital and third urosomites.

Figures

Armature formula of P1–P5 as follows: