Bacescapseudes, Gutu, 1981

DRUMM, DAVID T. & HEARD, RICHARD W., 2011, Systematic revision of the family Kalliapseudidae (Crustacea: Tanaidacea), Zootaxa 3142 (1), pp. 1-172 : 25-26

Key to species of Bacescapseudes

1. Cheliped of female with fixed finger broader than long ( Fig. 13A ).......................... B. grossidigitus Guţu, 2006

- Cheliped of female with fixed finger as long as broad or longer than broad ( Fig. 13B )............................... 2

2. Cheliped of female with dactylus nearly subequal to length of fixed finger ( Fig. 13B ); antenna with inner edges of medial extension on peduncular article 2 not crenulate ( Fig. 13C )................................. B. brevidigitus Guţu, 1998

- Cheliped of female with dactylus approximately twice length of fixed finger ( Fig. 13D ); antenna with inner edges of medial extension on peduncular article 2 crenulate ( Fig. 13E ).................................. B. adenaicus ( Băcescu, 1978)

Bacescapseudes adenaicus (B ă cescu, 1978)

Apseudes adenaicus Băcescu, 1978: 203–207 , Figs. 3 –4. Guţu, 1981: 85. Sieg, 1986: 22. Guţu, 1998: 180, 2006: 171. Bacescapseudes adenaicus Guţu, 1981: 85 . Sieg, 1986: 30. Guţu, 1998: 189, 2006: 172, 176.

Type material. Holotype male no. 379, allotype female no. 380, 15 paratypes no. 381, MHN Grigore Antipa.

Material examined. None available for study. Diagnosis prepared from that by Băcescu (1978).

Diagnosis. Cheliped of female having fixed finger approximately as long as broad, dactylus approximately twice length of fixed finger; male cheliped having basis lacking dorsal row of setae.

Type locality. Gulf of Aden , Indian Ocean (Fig. 1, number 2) .

Geographic distribution. Known from the type locality only.

Remarks. Guţu (1981) erected the genus Bacescapseudes to receive Apseudes adenaicus Băcescu, 1978 , taking into account the lack of a maxillule palp, the presence of sensory setae on the dactylus of the pereopods and the the subfamily Hemikalliapseudinae Guţu, 1972 . This species can be distinguished from the other congeners by the female cheliped having a very short carpus (about two times as long as broad). Unfortunately, we could not obtain type material so we used the published description and illustrations to prepare the key.

Bacescapseudes brevidigitus Gu ţ u, 1998

Bacescapseudes brevidigitus Guţu, 1998: 181–189 , Figs. 1–5.

Type material. Holotype, female with oostegites no. 250.166, 2 female paratypes no. 250.167, MHN Grigore Antipa.

Material examined. None available for study. Diagnosis prepared from that by Guţu (1998).

Diagnosis (female). Cheliped fixed finger longer than broad, dactylus slightly longer than fixed finger. Cheliped and pereopod 1 exopodite with four plumose setae. Pereopods 2–5 with one seta on ventral margin of dactylus.

Type locality. Mbudia, Tanzanian Coast, Indian Ocean , depth 12 m (Fig. 1, number 3) .

Geographic distribution. Known from the type locality only.

Remarks. This species can easily be distinguished from the other species of Bacescapseudes by the very short, subequal fixed finger and dactylus of the female cheliped.

Bacescapeudes grossidigitus Gu ţ u, 2006

Bacescapseudes grossidigitus Guţu, 2006: 172–178 , Figs. 286–308.

Type material. Holotype female with oostegites no. 250.255, allotype male no. 250.256 and 10 paratypes no. 250.257 (3 ovigerous females, 6 females with or without oostegites and 1 juvenile), MHN Grigore Antipa.

Material examined. None available for study. Diagnosis prepared from that by Guţu (2006).

Diagnosis. Cheliped fixed finger broader than long. Cheliped exopodite with four plumose setae, pereopod 1 exopodite with six plumose setae. Pereopods 2–5 with more than one seta on ventral margin of dactylus. Male cheliped with row of setae on dorsal margin of basis.

Type locality. Mbudia Island , Tanzania, Indian Ocean (Fig. 1, number 4) .

Geographic distribution. Known from the type locality only.

Remarks. This species can be distinguished from the other congeners by the female cheliped fixed finger broader than long (about twice as broad as long).

Figures

FIGURE 13. A. Bacescapseudes grossidigitus, female chela modified after Guţu (2006). B. Bacescapseudes brevidigitus, female chela modified after Guţu (1998). C. Bacescapseudes brevidigitus, antenna modified after Guţu (1998). D. Bacescapseudes adenaicus, female chela modified after Băcescu (1978). E. Bacescapseudes adenaicus, antenna modified after Băcescu (1978).